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AP actual allowed max users

Publication Date:  2018-01-28 Views:  98 Downloads:  0
Issue Description

When large number of users (max 35 user) connect to the same SSID on the same AP network is disconnected on some users 

AC6605 Version V200R005C10SPC300
FitAP5X30XN_V200R005C10SPCc00


Alarm Information

Station association and users online failed logs and records are generated:

#Sep 25 2017 11:00:51+02:00 AC6605 WLAN/4/STA_ASSOCIATION_FAIL:OID 1.3.6.1.4.1.2011.6.139.6.9.1.2 Station association is failed notify.(APID=66, APID=66,RadioID=0, StaMAC=[18.cf.5e.b9.27.04 (hex)], APMAC=[e0.97.96.49.b0.80 (hex)], BssId=[e0.97.96.49.b0.83 (hex)], SSId=MarketLab, FailType=Reason code, FailCause=9), FailCauseStr=Not authenticated with responding STA

#Sep 25 2017 10:59:49+02:00 AC6605 WLAN/4/STA_ASSOCIATION_FAIL:OID 1.3.6.1.4.1.2011.6.139.6.9.1.2 Station association is failed notify.(APID=80, APID=80,RadioID=0, StaMAC=[a0.e4.53.87.17.23 (hex)], APMAC=[e0.97.96.49.b2.00 (hex)], BssId=[e0.97.96.49.b2.01 (hex)], SSId=Student, FailType=Reason code, FailCause=9), FailCauseStr=Not authenticated with responding STA







Handling Process

1- Upgrading AC and all APs to latest version for better performance but issue still the same

AC version V200R006C10SPC200 

AP5030DN version V200R005C10SPCc00
AP6510DN-AGN version V200R005C00SPCa00 

2- Checkign Affected AP radio utilization, and it is very high 
78%,


Root Cause
Access number means user just connect to wifi while they don’t do anything .Concurrent number means user connect to wifi , at the same time, they browser , watch video or other consume traffic service.

This two number is different. For the customer environment, it belongs to concurrent scenario, more than 30 PC works at the same time, and taking the exam or video. Besides, most of them can only support 2.4g , and belongs to single spatial stream, so based on the following table, if the bandwidth is 512kbps, it can only support 25 terminal work at the same time . so that’s why when access user exceed more than 30, new user is difficult to access the wifi.


Solution

1-limit the user speed:

[AC-wlan-view] traffic-profile name test                                     
[AC-wlan-traffic-prof-test]rate-limit client down 4096                      
[AC-wlan-traffic-prof- test]rate-limit client up 2048

2- Enable edca fuction: allows APs to adjust EDCA parameters flexibly to reduce the possibility of collision, improve the throughput, and enhance user experience.
[AC6605-wlan-rrm-prof-test]dynamic-edca enable  


3- Adding
more APs in the network to allow more users access

Suggestions

Manage WLAN bandwidth properly to in order to not affect user association 

END